again, one school, headow meadow elementary school this newtown -- in newtown closed for precautionary reasons this morning. jon: let's take you down to georgia now. law enforcement is taking on terrorists. officers at the georgia facility learn to combat terrorists' ever-changing strategies from cyber warfare to handling weapons of mass destruction. steve harrigan live in brunswick, georgia, with more for us. steve? >> reporter: jon, watching these counterterrorism exercises can really get your heartbeating, and that's the goal, is to take these federal responders and put them in situations of real pressure. >> let's go. [gunfire] >> reporter: at the federal law enforcement training center in brunswick, georgia, they use blank ammunition -- >> police! >> reporter: -- but real actors. >> you can't simulate behavior. you have to use people to simulate behavior. >> reporter: 60,000 federal agents a year come to the 1600-acre site complete with mock airplanes, bars and a test track. the important thing in performing a pit maneuver is location. no embankments, no bridges and no con congest